BTRFS Thin Provisioning?

[SilvaNights]

Hi,

Using Proxmox 7.3-4.
Is it possible to use VM thin provisioning on a BTRFS datastore?
I've found some articles saying it should be possible, and some guides on how to enable it on ZFS, but I can't see the option within the UI for BTRFS.

Many thanks.

 

[fiona]

Hi,
I think it's already thinly provisioned by default:

root@pve701 ~ # qemu-img info /mybtrfs/images/164/vm-164-disk-0/disk.raw
image: /mybtrfs/images/164/vm-164-disk-0/disk.raw
file format: raw
virtual size: 204 GiB (219043332096 bytes)
disk size: 2.55 GiB

Compare the virtual size (what the VM sees) and the disk size (what's currently allocated).

 

[SilvaNights]

Hi,
I think it's already thinly provisioned by default:

root@pve701 ~ # qemu-img info /mybtrfs/images/164/vm-164-disk-0/disk.raw
image: /mybtrfs/images/164/vm-164-disk-0/disk.raw
file format: raw
virtual size: 204 GiB (219043332096 bytes)
disk size: 2.55 GiB

Compare the virtual size (what the VM sees) and the disk size (what's currently allocated).

Hi,

Doh! You are correct, thanks.